& \, L4 a. G9 F0 _. rStandard(s)-(year and edition): 8 z' \, X7 U/ B* H3 \0 e5 y" lIEC 61643-1, 2nd edition, 2005-03 % u* O @0 {: b, ?; T' m5 ]) gSub clause(s): 7.5 a) 7.5.4 a) ) I$ Y+ S) x5 ?. {
DSH- 6436 T( [8 h6 m, W4 i' A
Subject:# [5 P& x6 L2 T9 ?! }/ n4 m
Measured limiting voltage : `+ W Q1 `0 z# Z; Q9 O4 p7 VKey words:" a2 W% ? Z1 u6 L1 q' K" a3 W3 z
- measured limiting voltage - [8 `/ V: d. P5 }8 g- protection level " J& a& p# G8 r8 M+ A+ B, T$ U- energised testing. h& U4 p0 q. v! B% m; w# j
Approved by the 45th CTL plenary meeting 2008. G, v$ w% S7 `4 i4 ^
Question: / s6 V. q* y& m/ x' t2 W1 GTesting of one port SPDs according to test class III (Type 3): , X. Y5 M, m4 M" E4 r2 H* sShould the test to measure the limiting voltage with the combination wave be performed with the SPD being energised at Uc or without energisation? / i3 R7 }$ Q1 ~- ?) ?Rationale:# _1 ?! J9 Y0 h! v! z
Clause 7.5 a) of the standard requires: & a6 P# E0 ]$ }' m r5 P$ TAll one-port SPDs shall be tested unenergized. …4 G4 q% X8 t8 P6 A8 }3 l8 ]! x
Clause 7.5.4 of the standard requires: & ?+ S' W6 }* P$ Q$ P9 }a) The combination wave will be applied to an energized SPD, with the mains voltage at Uc. + A' F: m2 O+ \2 X0 Y" ?As testing energised may give higher measurement results, the test should be performed energised ( T/ I, u+ n, h7 Z/ ?7 T& gDecision: / R5 v4 ?3 [' ?/ qThe test shall be performed with the SPD being energised at Uc., R, s" Z, s% N! I9 M3 @9 [
, R9 e+ c; g; s& Y0 b1 B; Y( c[attach]77213[/attach] + L. W% p b) E; O: @
DSH 643& J! v$ f& t x$ @( O